基于SurfaceView的可拖动视频控件
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2022-09-11 14:38:08
视频播放控件（一） 可拖动，变换SurfaceView ......
视频播放控件（一） 可拖动，变换SurfaceView
1 public class DragSurfaceView extends SurfaceView implements View.OnTouchListener {
2 protected int screenWidth;
3 protected int screenHeight;
4 protected int lastX;
5 protected int lastY;
6 private int oriLeft;
7 private int oriRight;
8 private int oriTop;
9 private int oriBottom;
10 private int dragDirection;
11 private static final int TOP = 0x15;
12 private static final int LEFT = 0x16;
13 private static final int BOTTOM = 0x17;
14 private static final int RIGHT = 0x18;
15 private static final int LEFT_TOP = 0x11;
16 private static final int RIGHT_TOP = 0x12;
17 private static final int LEFT_BOTTOM = 0x13;
18 private static final int RIGHT_BOTTOM = 0x14;
19 private static final int CENTER = 0x19;
20 private int offset = 20;
21
22 /**
23 * 初始化获取屏幕宽高
24 */
25 protected void initScreenW_H() {
26 screenHeight = getResources().getDisplayMetrics().heightPixels - 40;
27 screenWidth = getResources().getDisplayMetrics().widthPixels;
28 Log.i("DragViewTAG", "DragSurfaceView.initScreenW_H: screenWidth="+screenWidth+", screenHeight="+screenHeight);
29 }
30 public DragSurfaceView(Context context) {
31 super(context);
32 setOnTouchListener(this);
33 initScreenW_H();
34 }
35
36 public DragSurfaceView(Context context, AttributeSet attrs) {
37 super(context, attrs);
38 setOnTouchListener(this);
39 initScreenW_H();
40 }
41
42 public DragSurfaceView(Context context, AttributeSet attrs, int defStyleAttr) {
43 super(context, attrs, defStyleAttr);
44 setOnTouchListener(this);
45 initScreenW_H();
46 }
47
48
49 @Override
50 public boolean onTouch(View v, MotionEvent event) {
51 int action = event.getAction();
52 if (action == MotionEvent.ACTION_DOWN) {
53 oriLeft = v.getLeft();
54 oriRight = v.getRight();
55 oriTop = v.getTop();
56 oriBottom = v.getBottom();
57 lastY = (int) event.getRawY();
58 lastX = (int) event.getRawX();
59 dragDirection = getDirection(v, (int) event.getX(),
60 (int) event.getY());
61 }
62 // 处理拖动事件
63 delDrag(v, event, action);
64 if(action==MotionEvent.ACTION_UP){
65 dragDirection=0;
66 }
67 invalidate();
68 return true;
69 }
70
71
72 /**
73 * 获取触摸点flag
74 *
75 * @param v
76 * @param x
77 * @param y
78 * @return
79 */
80 protected int getDirection(View v, int x, int y) {
81 int left = v.getLeft();
82 int right = v.getRight();
83 int bottom = v.getBottom();
84 int top = v.getTop();
85 if (x < 40 && y < 40) {
86 return LEFT_TOP;
87 }
88 if (y < 40 && right - left - x < 40) {
89 return RIGHT_TOP;
90 }
91 if (x < 40 && bottom - top - y < 40) {
92 return LEFT_BOTTOM;
93 }
94 if (right - left - x < 40 && bottom - top - y < 40) {
95 return RIGHT_BOTTOM;
96 }
97 if (x < 40) {
98 return LEFT;
99 }
100 if (y < 40) {
101 return TOP;
102 }
103 if (right - left - x < 40) {
104 return RIGHT;
105 }
106 if (bottom - top - y < 40) {
107 return BOTTOM;
108 }
109 return CENTER;
110 }
111
112 /**
113 * 处理拖动事件
114 *
115 * @param v
116 * @param event
117 * @param action
118 */
119 protected void delDrag(View v, MotionEvent event, int action) {
120 switch (action) {
121 case MotionEvent.ACTION_MOVE:
122 int dx = (int) event.getRawX() - lastX;
123 int dy = (int) event.getRawY() - lastY;
124 switch (dragDirection) {
125 case LEFT: // 左边缘
126 left(v, dx);
127 break;
128 case RIGHT: // 右边缘
129 right(v, dx);
130 break;
131 case BOTTOM: // 下边缘
132 bottom(v, dy);
133 break;
134 case TOP: // 上边缘
135 top(v, dy);
136 break;
137 case CENTER: // 点击中心-->>移动
138 center(v, dx, dy);
139 break;
140 case LEFT_BOTTOM: // 左下
141 left(v, dx);
142 bottom(v, dy);
143 break;
144 case LEFT_TOP: // 左上
145 left(v, dx);
146 top(v, dy);
147 break;
148 case RIGHT_BOTTOM: // 右下
149 right(v, dx);
150 bottom(v, dy);
151 break;
152 case RIGHT_TOP: // 右上
153 right(v, dx);
154 top(v, dy);
155 break;
156 default:
157 break;
158 }
159 v.layout(oriLeft, oriTop, oriRight, oriBottom);
160 // if (dragDirection != CENTER) {
161 // v.layout(oriLeft, oriTop, oriRight, oriBottom);
162 // }
163 lastX = (int) event.getRawX();
164 lastY = (int) event.getRawY();
165 Log.i("DragViewTAG", "DragSurfaceView.delDrag:ACTION_MOVE direction="+dragDirection+", left="+oriLeft+", top="+oriTop+", right="+oriRight+", bottom="+oriBottom);
166 break;
167 case MotionEvent.ACTION_UP:
168 ViewGroup.LayoutParams newLayoutParams = getNewLayoutParams();
169 if(newLayoutParams!=null){
170 Log.i("DragViewTAG", "DragSurfaceView.delDrag:ACTION_UP width="+newLayoutParams.width+", height="+newLayoutParams.height);
171 setLayoutParams(newLayoutParams);
172 }else {
173 Log.e("DragViewTAG", "DragSurfaceView.delDrag: 父组件类型？");
174 v.layout(oriLeft, oriTop, oriRight, oriBottom);
175 }
176 break;
177 default:
178 break;
179 }
180 }
181
182 private ViewGroup.LayoutParams getNewLayoutParams(){
183 if(getLayoutParams() instanceof RelativeLayout.LayoutParams){
184 RelativeLayout.LayoutParams lp = (RelativeLayout.LayoutParams)getLayoutParams( );
185 lp.leftMargin = oriLeft;
186 lp.topMargin = oriTop;
187 lp.width = oriRight-oriLeft;
188 lp.height = oriBottom-oriTop;
189 return lp;
190 }else if(getLayoutParams() instanceof FrameLayout.LayoutParams) {
191 FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) getLayoutParams();
192 lp.leftMargin = oriLeft;
193 lp.topMargin = oriTop;
194 lp.width = oriRight - oriLeft;
195 lp.height = oriBottom - oriTop;
196 return lp;
197 }
198 return null;
199 }
200
201 /**
202 * 触摸点为中心->>移动
203 *
204 * @param v
205 * @param dx
206 * @param dy
207 */
208 private void center(View v, int dx, int dy) {
209 oriLeft += dx;
210 oriTop += dy;
211 oriRight += dx;
212 oriBottom += dy;
213 Log.i("DragViewTAG", "DragSurfaceView.center: v.left="+v.getLeft()+", v.top="+v.getTop());
214 if (oriLeft < -offset) {
215 Log.e("DragViewTAG", "DragSurfaceView.center: 左侧越界, left="+oriLeft+", offset="+offset);
216 oriLeft = -offset;
217 oriRight = oriLeft + v.getWidth();
218 }
219 if (oriRight > screenWidth + offset) {
220 Log.e("DragViewTAG", "DragSurfaceView.center: 右侧越界, right="+oriRight+", screenWidth="+screenWidth+", offset="+offset);
221 oriRight = screenWidth + offset;
222 oriLeft = oriRight - v.getWidth();
223 }
224 if (oriTop < -offset) {
225 Log.e("DragViewTAG", "DragSurfaceView.center: 顶部越界, top="+oriTop+", offset="+offset);
226 oriTop = -offset;
227 oriBottom = oriTop + v.getHeight();
228 }
229 if (oriBottom > screenHeight + offset) {
230 Log.e("DragViewTAG", "DragSurfaceView.center: 底部越界, bottom="+oriBottom+", screenHeight="+screenHeight+", offset="+offset);
231 oriBottom = screenHeight + offset;
232 oriTop = oriBottom - v.getHeight();
233 }
234 // v.layout(left, top, right, bottom);
235
236 }
237
238 /**
239 * 触摸点为上边缘
240 *
241 * @param v
242 * @param dy
243 */
244 private void top(View v, int dy) {
245 oriTop += dy;
246 if (oriTop < -offset) {
247 oriTop = -offset;
248 }
249 if (oriBottom - oriTop - 2 * offset < 200) {
250 oriTop = oriBottom - 2 * offset - 200;
251 }
252 }
253
254 /**
255 * 触摸点为下边缘
256 *
257 * @param v
258 * @param dy
259 */
260 private void bottom(View v, int dy) {
261 oriBottom += dy;
262 if (oriBottom > screenHeight + offset) {
263 oriBottom = screenHeight + offset;
264 }
265 if (oriBottom - oriTop - 2 * offset < 200) {
266 oriBottom = 200 + oriTop + 2 * offset;
267 }
268 }
269
270 /**
271 * 触摸点为右边缘
272 *
273 * @param v
274 * @param dx
275 */
276 private void right(View v, int dx) {
277 oriRight += dx;
278 if (oriRight > screenWidth + offset) {
279 oriRight = screenWidth + offset;
280 }
281 if (oriRight - oriLeft - 2 * offset < 200) {
282 oriRight = oriLeft + 2 * offset + 200;
283 }
284 }
285
286 /**
287 * 触摸点为左边缘
288 *
289 * @param v
290 * @param dx
291 */
292 private void left(View v, int dx) {
293 oriLeft += dx;
294 if (oriLeft < -offset) {
295 oriLeft = -offset;
296 }
297 if (oriRight - oriLeft - 2 * offset < 200) {
298 oriLeft = oriRight - 2 * offset - 200;
299 }
300 }
301
302 /**
303 * 获取截取宽度
304 *
305 * @return
306 */
307 public int getCutWidth() {
308 return getWidth() - 2 * offset;
309 }
310
311 /**
312 * 获取截取高度
313 *
314 * @return
315 */
316 public int getCutHeight() {
317 return getHeight() - 2 * offset;
318 }
319 }